Molecular Assembly Through the Chain Reaction of Substituted Acenes on the Si(100)鈥?2 脳 1)鈥揌 Surface

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• 作者：Md. Zakir Hossain ; Hiroyuki S. Kato ; Jaehoon Jung ; Yousoo Kim ; Maki Kawai
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：September 26, 2013
• 年：2013
• 卷：117
• 期：38
• 页码：19436-19441
• 全文大小：368K
• 年卷期：v.117,no.38(September 26, 2013)
• ISSN：1932-7455

文摘

The formation of a molecular assembly through the chain reaction of some simple vinyl substituted acenes with the dangling bond site of H-terminated Si(100)-(2 脳 1) surface has been studied under ultrahigh vacuum conditions at room temperature. The molecular assemblies formed on the surface were checked using an in situ scanning tunneling microscope (STM). While styrene and 2-vinylnaphthalene undergo a dangling bond initiated chain reaction forming a perfectly ordered one-dimensional (1D) assembly as expected, 9-vinylanthracene exhibits unique behavior in forming the molecular assemblies studied to date. Both the perfectly ordered 1D and irregularly shaped disordered assemblies are formed by the 9-vinylanthracene molecules on the surface, which allows us to directly compare the interaction between molecules in two different assemblies. Biased dependent changes of the relative contrast of ordered and disordered assemblies formed by 9-vinylanthracene indicates a significant 蟺鈥撓€ interaction between the molecules in 1D assembly, which tends to delocalize and disperse the valence and conduction band of ordered assemblies. This study suggests that an increased 蟺鈥撓€ interaction is expected in a 1D assembly of larger molecules of the acene family, although there is a limit of forming such ordered assembly using larger acenes at room temperature.